https://git.reactos.org/?p=reactos.git;a=commitdiff;h=d75ccd01f7a9cf94293e6c12503e44c2bf768f34
commit d75ccd01f7a9cf94293e6c12503e44c2bf768f34 Author: Pierre Schweitzer <[email protected]> AuthorDate: Thu Mar 28 22:39:15 2019 +0100 Commit: Pierre Schweitzer <[email protected]> CommitDate: Thu Mar 28 22:39:38 2019 +0100 [NTOSKRNL] Only allow direct device open for FileFsDeviceInformation --- ntoskrnl/io/iomgr/iofunc.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/ntoskrnl/io/iomgr/iofunc.c b/ntoskrnl/io/iomgr/iofunc.c index 73938adb93a..5fd1a130ef7 100644 --- a/ntoskrnl/io/iomgr/iofunc.c +++ b/ntoskrnl/io/iomgr/iofunc.c @@ -4063,6 +4063,14 @@ NtQueryVolumeInformationFile(IN HANDLE FileHandle, NULL); if (!NT_SUCCESS(Status)) return Status; + /* Only allow direct device open for FileFsDeviceInformation */ + if (BooleanFlagOn(FileObject->Flags, FO_DIRECT_DEVICE_OPEN) && + FsInformationClass != FileFsDeviceInformation) + { + ObDereferenceObject(FileObject); + return STATUS_INVALID_DEVICE_REQUEST; + } + /* Check if we should use Sync IO or not */ if (FileObject->Flags & FO_SYNCHRONOUS_IO) {
